Atmospheric temperature measuring method based on Brillouin laser radar system
A technology of atmospheric temperature and laser radar, which is applied to the temperature measurement of moving fluids, thermometers, and heat measurement. It can solve the problems of measurement accuracy and application constraints, the model has no analytical form, and the temperature inversion is unstable. It is beneficial to the real world. Remote sensing real-time monitoring, improving real-time problems, and satisfying the effect of real-time online data analysis
Active Publication Date: 2017-08-04
EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH +1
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However, the model has no analytical form, the mathematical calculation is too complicated, and the environmental parameters in the real remote sensing measurement are unknown, which will bring great instability to the inversion of temperature, resulting in a greater impact on its measurement accuracy and application. constraint
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[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0055] A kind of atmospheric temperature measuring method of the embodiment of the present invention, its specific steps are as follows:
[0056] (1) Calculation of theoretical Rayleigh Brillouin linewidth
[0057] Since the influence of aerosols in the upper atmosphere is small, the temperature measurement lidar based on the echo signal energy detection is widely used, so the application range of the spectrum detection lidar is mostly in the lower atmosphere.
[0058] According to the American Standard Atmosphere, in the typical climate of the northern hemisphere, the atmospheric temperature dist...
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The invention discloses an atmospheric temperature measuring method by employing a Brillouin laser radar system. The method includes: S1, calculating the spectral line widths at different temperatures and pressures; S2, performing fitting on the relation between the line width and the atmospheric temperature and the pressure by employing a Levenberg-Marquardt fitting algorithm to obtain a corresponding relation; S3, processing laser echo signals to obtain laser echo spectrum signals, and processing the laser echo spectrum signals to obtain a spectrum line width; and S4, obtaining the pressure in the current condition through calculation, and obtaining information of the atmospheric temperature by employing the obtained pressure and the line width obtained in step S3. The invention also discloses another method for measuring the atmospheric temperature by employing the Brillouin laser radar system. According to the method, by employing the relation between the atmospheric temperature and the pressure and the Rayleigh Brillouin line width, small measurement error of the atmospheric temperature is guaranteed, the problem of timeliness of measurement of the atmospheric temperature is substantially improved, and the atmospheric temperature can be simply and directly measured.
Description
technical field [0001] The invention relates to the field of atmospheric temperature measurement, in particular to an atmospheric temperature measurement method based on a Brillouin laser radar system. Background technique [0002] Atmospheric vertical temperature monitoring has always been an important research work in the fields of meteorology, environmental protection, and space engineering, and it is also an important field of lidar applications. Among them, the detection of Raman scattering echo signals through spectral signals is widely used in low-altitude atmosphere. [0003] However, from the perspective of scattering mechanism, the Raman scattering cross section is much smaller than that of Rayleigh Brillouin, and the echo signal is very weak. This will require high-power laser emitting equipment and high-sensitivity receiving equipment, and the cost is relatively high, and the cost of large-scale network deployment big. At the same time, the Raman scattering echo...
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IPC IPC(8): G01S17/95G01K13/02G01K11/322
CPCG01K13/028G01S17/95Y02A90/10
Inventor 梁琨周波
Owner EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH